:root {
  --primary: #e6005c;
  --primary-hover: #c4004e;
  --primary-light: #fff0f5;
  --accent: #ff3385;
  --text-main: #1f2329;
  --text-muted: #5a626d;
  --bg-main: #fdfafb;
  --card-bg: #ffffff;
  --border: #f7d5e2;
  --shadow-sm: 0 4px 12px rgba(230, 0, 92, 0.05);
  --shadow-md: 0 8px 24px rgba(230, 0, 92, 0.08);
  --shadow-lg: 0 16px 36px rgba(230, 0, 92, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.site-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-box {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand-box .ai-page-logo {
  height: 38px;
  width: auto;
  display: block;
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
}
.nav-links a {
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.2s ease;
  white-space: nowrap;
}
.nav-links a:hover {
  color: var(--primary);
}
.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff !important;
  padding: 8px 18px !important;
  border-radius: 99px;
  box-shadow: 0 4px 10px rgba(230, 0, 92, 0.25);
  transition: all 0.2s ease;
}
.nav-cta-btn:hover {
  background: var(--primary-hover) !important;
  transform: translateY(-1px);
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: 0.3s;
}
.hero-section {
  position: relative;
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #fff2f7 0%, #fff 100%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.hero-content {
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--border);
  padding: 6px 16px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-title {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
}
.hero-title span {
  color: var(--primary);
}
.hero-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 32px;
  line-height: 1.6;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.btn-primary {
  background: var(--primary);
  color: #ffffff;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 99px;
  box-shadow: 0 8px 20px rgba(230, 0, 92, 0.3);
  transition: all 0.25s ease;
  border: 2px solid var(--primary);
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-2px);
}
.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  padding: 14px 30px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 99px;
  border: 2px solid var(--border);
  transition: all 0.25s ease;
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.hero-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: left;
}
.matrix-card {
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.matrix-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.matrix-card .val {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.matrix-card .lbl {
  font-size: 13px;
  color: var(--text-muted);
}
.section-block {
  padding: 80px 0;
  position: relative;
}
.section-alt {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}
.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-muted);
}
.platform-intro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.intro-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.intro-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.intro-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.intro-card h3::before {
  content: "";
  display: block;
  width: 6px;
  height: 18px;
  background: var(--primary);
  border-radius: 4px;
}
.intro-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}
.models-tag-cloud {
  background: var(--primary-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-top: 40px;
  text-align: center;
}
.models-tag-cloud h4 {
  font-size: 15px;
  color: var(--primary);
  margin-bottom: 16px;
  font-weight: 700;
}
.tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.tag-item {
  background: #fff;
  color: var(--text-main);
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 99px;
  border: 1px solid var(--border);
  font-weight: 500;
}
.grid-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.feature-box h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.feature-box p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  flex-grow: 1;
}
.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.step-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.step-num {
  width: 44px;
  height: 44px;
  line-height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 16px;
  margin: 0 auto 16px;
  border: 1px solid var(--border);
}
.step-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 13px;
  color: var(--text-muted);
}
.cases-gallery {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 20px;
}
.case-img-wrap {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.case-img-wrap img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.case-caption {
  padding: 14px;
}
.case-caption h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}
.case-caption p {
  font-size: 12px;
  color: var(--text-muted);
}
.eval-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.eval-badge-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.eval-score {
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.score-val {
  font-size: 40px;
  font-weight: 900;
  color: var(--primary);
}
.score-max {
  font-size: 16px;
  color: var(--text-muted);
}
.eval-stars {
  color: #ff9900;
  font-size: 18px;
  letter-spacing: 2px;
}
.eval-table-container {
  overflow-x: auto;
}
.eval-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.eval-table th, .eval-table td {
  padding: 14px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.eval-table th {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
}
.eval-table tr:hover td {
  background: #fff9fb;
}
.comments-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.comment-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.comment-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.comment-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}
.comment-user h4 {
  font-size: 14px;
  font-weight: 700;
}
.comment-user p {
  font-size: 12px;
  color: var(--text-muted);
}
.comment-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-question:hover {
  color: var(--primary);
}
.faq-icon {
  font-size: 18px;
  color: var(--primary);
  transition: transform 0.2s ease;
}
.faq-answer {
  display: none;
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  border-top: 1px solid #fce8f0;
  margin-top: -6px;
  padding-top: 12px;
}
.faq-item.active .faq-answer {
  display: block;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.contact-section-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}
.contact-info-side h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}
.contact-info-list {
  list-style: none;
  margin-bottom: 24px;
}
.contact-info-list li {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.contact-info-list strong {
  color: var(--text-main);
}
.qr-container {
  display: flex;
  gap: 20px;
  align-items: center;
}
.qr-card {
  text-align: center;
  background: var(--primary-light);
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.qr-card img {
  width: 110px;
  height: 110px;
  display: block;
  margin-bottom: 6px;
  border-radius: 4px;
}
.qr-card span {
  font-size: 12px;
  color: var(--text-main);
  font-weight: 600;
}
.form-side form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}
.form-group input, .form-group select, .form-group textarea {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
  background: #fafafa;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary);
  background: #fff;
}
.form-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 12px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s;
}
.form-btn:hover {
  background: var(--primary-hover);
}
.articles-list-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.article-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}
.article-links a {
  font-size: 13px;
  color: var(--primary);
  text-decoration: none;
  background: var(--primary-light);
  padding: 6px 14px;
  border-radius: 99px;
  border: 1px solid var(--border);
  transition: background 0.2s;
}
.article-links a:hover {
  background: #ffdeeb;
}
.banner-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.banner-strip .ai-page-image {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border);
  padding: 40px 0 24px;
  color: var(--text-muted);
  font-size: 13px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 30px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}
.footer-col p {
  line-height: 1.6;
  margin-bottom: 8px;
}
.friendly-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.friendly-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}
.friendly-links a:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
  color: #88929e;
  font-size: 12px;
}
.fixed-tools {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tool-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  text-decoration: none;
  font-size: 18px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.tool-btn:hover {
  background: var(--primary);
  color: #fff;
  transform: scale(1.05);
}
@media (max-width: 992px) {
  .hero-matrix { grid-template-columns: repeat(2, 1fr); }
  .platform-intro-grid { grid-template-columns: 1fr; }
  .grid-cards { grid-template-columns: repeat(2, 1fr); }
  .workflow-steps { grid-template-columns: repeat(2, 1fr); }
  .cases-gallery { grid-template-columns: 1fr; }
  .comments-grid { grid-template-columns: 1fr; }
  .contact-section-inner { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 20px; }
  .banner-strip { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.show { display: flex; }
  .nav-links a { width: 100%; text-align: center; padding: 12px 0; }
  .hero-title { font-size: 26px; }
  .hero-matrix { grid-template-columns: 1fr; }
  .grid-cards { grid-template-columns: 1fr; }
  .workflow-steps { grid-template-columns: 1fr; }
  .qr-container { flex-direction: column; align-items: flex-start; }
}